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import {delimiter} from './regex.js'
import {registerMethods} from './methods.js'
import {makeInstance} from './adopter.js'
let listenerId = 0
function getEvents (node) {
const n = makeInstance(node).getEventHolder()
if (!n.events) n.events = {}
return n.events
}
function getEventTarget (node) {
return makeInstance(node).getEventTarget()
}
function clearEvents (node) {
const n = makeInstance(node).getEventHolder()
if (n.events) n.events = {}
}
// Add event binder in the SVG namespace
export function on (node, events, listener, binding, options) {
var l = listener.bind(binding || node)
var bag = getEvents(node)
var n = getEventTarget(node)
// events can be an array of events or a string of events
events = Array.isArray(events) ? events : events.split(delimiter)
// ensure instance object for nodes which are not adopted
// n.instance = n.instance || {events: {}}
// pull event handlers from the element
// var bag = n.instance.events
// add id to listener
if (!listener._svgjsListenerId) {
listener._svgjsListenerId = ++listenerId
}
events.forEach(function (event) {
var ev = event.split('.')[0]
var ns = event.split('.')[1] || '*'
// ensure valid object
bag[ev] = bag[ev] || {}
bag[ev][ns] = bag[ev][ns] || {}
// reference listener
bag[ev][ns][listener._svgjsListenerId] = l
// add listener
n.addEventListener(ev, l, options || false)
})
}
// Add event unbinder in the SVG namespace
export function off (node, events, listener, options) {
var bag = getEvents(node)
var n = getEventTarget(node)
// we cannot remove an event if its not an svg.js instance
// if (!n.instance) return
// listener can be a function or a number
if (typeof listener === 'function') {
listener = listener._svgjsListenerId
if (!listener) return
}
// pull event handlers from the element
// var bag = n.instance.events
// events can be an array of events or a string or undefined
events = Array.isArray(events) ? events : (events || '').split(delimiter)
events.forEach(function (event) {
var ev = event && event.split('.')[0]
var ns = event && event.split('.')[1]
var namespace, l
if (listener) {
// remove listener reference
if (bag[ev] && bag[ev][ns || '*']) {
// removeListener
n.removeEventListener(ev, bag[ev][ns || '*'][listener], options || false)
delete bag[ev][ns || '*'][listener]
}
} else if (ev && ns) {
// remove all listeners for a namespaced event
if (bag[ev] && bag[ev][ns]) {
for (l in bag[ev][ns]) { off(n, [ev, ns].join('.'), l) }
delete bag[ev][ns]
}
} else if (ns) {
// remove all listeners for a specific namespace
for (event in bag) {
for (namespace in bag[event]) {
if (ns === namespace) { off(n, [event, ns].join('.')) }
}
}
} else if (ev) {
// remove all listeners for the event
if (bag[ev]) {
for (namespace in bag[ev]) { off(n, [ev, namespace].join('.')) }
delete bag[ev]
}
} else {
// remove all listeners on a given node
for (event in bag) { off(n, event) }
clearEvents(node)
}
})
}
export function dispatch (node, event, data) {
var n = getEventTarget(node)
// Dispatch event
if (event instanceof window.Event) {
n.dispatchEvent(event)
} else {
event = new window.CustomEvent(event, {detail: data, cancelable: true})
n.dispatchEvent(event)
}
return event
}
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